ILE4278 Datasheet, PDF (1/18 Pages) IK Semicon Co., Ltd – 5-V Low-Drop Fixed Voltage Regulator

Preliminary
5-V Low-Drop Fixed Voltage Regulator
TECHNICAL DATA
ILE 4278
Features
• Output voltage tolerance ® 2%, 4%
• Very low current consumption
• Separated reset and watchdog output
• Low-drop voltage
• Watchdog
• Adjustable watchdog activating threshold
• Adjustable reset threshold
• Overtemperature protection
• Reverse polarity protection
• Short-circuit proof
• Suitable for use in automotive electronics
• Wide temperature range
P-DSO-14-8
Functional Description
The ILE 4278 is a monolithic integrated low-drop fixed-voltage regulator which can
supply loads up to 200 mA. The device is available in the 14-SOP-225 package. It is
designed to supply microprocessor systems under the severe conditions of automotive
applications and therefore equipped with additional protection functions against over
load, short circuit and overtemperature. Of course the ILE 4278 can also be used in
other applications where a stabilized voltage is required.
An input voltage V_I in the range of 6V ® V_I ® 28V is regulated to V_Q,nom = 5 V with an
accuracy of 2%.
An input voltage V_I in the range of 28V ® V_I ® 45 V is regulated to V_Q,nom = 5 V with an
accuracy of 4%.
The device operates in the wide temperature range of T_j = – 40 to 12 5 C.
Two additional features are implemented in the ILE 4278 a load dependent watchdog
function as well as a sophisticated reset function including power on reset, under voltage
reset, adjustable reset delay time and adjustable reset switching threshold.
The watchdog function monitors the microcontroller, including time base failures. In case
of a missing rising edge within a certain pulse repetition time the watchdog output is set
to LOW. Programming of the max. repetition time can be done easily by an external reset
Rev. 00
1